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| 氯菊酯在不同质地土壤中的光降解动力学规律 |
| Photodegradation Kinetics of Permethrin in Different Soil Texture |
| 投稿时间：2015-03-19 修订日期：2015-06-10 |
| DOI：10.14050/j.cnki.1672-9250.2016.01.007 |
| 中文关键词: 氯菊酯;光降解;降解动力学;土壤;土壤机械组成 |
| 英文关键词: permethrin;photo degradation;degradation kinetics;soil;soil texture |
| 基金项目:国家自然科学基金项目(21377033);河北省教育厅重点项目(ZD20131046) |
| 作者 | 单位 | | 刘芃岩, 田磊, 张彦娜, 张雅婧, 张瑞瑞 | 河北大学 化学与环境科学学院, 河北 保定 071002 |
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| 中文摘要: |
| 为了研究氯菊酯在土壤中的光降解规律,更好地为其在自然环境中的降解提供理论依据,探讨了氯菊酯在不同质地土壤中,不同条件下的光降解动力学规律。结果表明:氯菊酯降解符合准一级动力学规律,氯菊酯的降解受土壤质地的影响较大,在不同土壤中降解率为:壤质砂土 > 砂质壤土 > 壤质黏土,日光比紫外光照射下腐殖酸对氯菊酯的降解影响明显,随着腐殖酸浓度的增加,它对氯菊酯的降解作用先促进后抑制。 |
| 英文摘要: |
| In order to study the fate of permethrin photodegradation in the soil and to provide better theoretical basis for degradation of permethrin in natural environment, degradation kinetics of permethrin photodegradation was investigated in the different soil mechanical compositions and under different conditions. Results show that all photodegradation reactions followed Pseudo-first-order kinetics, and permethrin degradation was greatly influenced by soil texture. Degradation rate of permethrin under tested conditions followed the order of loamy sand > sandy loam > loamy clay. It is greater under sunlight than under UV light that humic acid affects photo degradation of permethrin. Humic acid plays a promoter role on degradation at first and with the increasing of its concentration it plays an inhibit role. |
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